Lithium iron phosphate battery surface printing device

Abstract

The invention relates to the field of lithium battery printing, in particular to a lithium iron phosphate battery surface printing device. The lithium iron phosphate battery surface printing device comprises a fixing frame, a CCD camera, an automatic conveying belt and the like, the automatic conveying belt is mounted on the fixing frame, square through holes are formed in the front side and the rear side of the fixing frame, and the CCD camera is mounted on the fixing frame. CCD cameras are installed on the upper portion, the front side and the rear side of the inner side of the fixing frame, and the CCD cameras on the front side and the rear side are located between the adjacent square through holes. The CCD camera can be used for carrying out photographing defect detection on the appearance of the acid iron lithium battery, the moving mechanism is arranged to move the slight and serious acid iron lithium batteries to the designated printing machine, and then designated marks are printed on the acid iron lithium batteries with different defect degrees through the designated printing machine. The purposes of full-automatic appearance detection and mark printing are achieved, and re-detection during follow-up confusion is avoided.

Description

Technical Field

[0001] The invention relates to the field of lithium battery printing, and in particular to a surface printing device for a lithium iron phosphate battery. Background Art

[0002] Lithium iron phosphate battery is a lithium-ion battery. Its positive electrode material is lithium iron phosphate, while the negative electrode usually uses carbon material. During the production process of lithium iron phosphate batteries, it is necessary to test the degree of appearance defects of the produced lithium iron phosphate batteries, and print designated labels on the surface of the lithium iron phosphate batteries according to the degree of defects, so that they can be classified and processed accordingly according to the labels later.

[0003] At present, the appearance inspection of lithium iron phosphate batteries mainly relies on advanced visual inspection systems. These systems can accurately identify defects on the surface of the battery according to preset parameter standards and automatically assess the severity of the defects. The system usually sets a threshold value to distinguish between minor and serious defects and guide lithium iron phosphate batteries with different defect levels to their respective classification areas. Lithium iron phosphate batteries with minor defects will be automatically classified into a specific area, while lithium iron phosphate batteries with serious defects will be sent to another specific area. In this way, the automatic system can initially screen and classify lithium iron phosphate batteries, but in the subsequent processing process, lithium iron phosphate batteries with different degrees of defects may still be confused due to various factors. For example, during the handling, storage or further processing of lithium iron phosphate batteries, once confusion in the classification of lithium iron phosphate batteries is found, it is usually necessary to restart the appearance inspection process and conduct secondary inspection and classification of the lithium iron phosphate batteries, which adds additional workload and is very troublesome.

[0004] In summary, there is an urgent need for a lithium iron phosphate battery surface printing device that can fully automatically perform appearance inspection, classification and print marks on lithium iron phosphate batteries to solve the above problems. Summary of the invention

[0005] In order to overcome the disadvantage that after the existing visual inspection system performs appearance inspection and classification on lithium iron phosphate batteries, lithium iron phosphate batteries may be confused and need to be re-inspected, which increases additional workload, an object of the present invention is to provide a lithium iron phosphate battery surface printing device that can fully automatically perform appearance inspection, classification and print marks on lithium iron phosphate batteries.

[0006] The technical implementation scheme of the present invention is:

[0007] A lithium iron phosphate battery surface printing device comprises a fixed frame, a CCD camera, an automatic conveyor belt, a printer, a blocking mechanism and a moving mechanism, wherein the automatic conveyor belt is installed on the fixed frame, square through holes are opened on the front and rear sides of the fixed frame, a guide rod is connected between the front and rear sides of the inner side of the fixed frame, CCD cameras are installed on the upper inner side and the front and rear sides of the fixed frame, the CCD cameras on the front and rear sides are located in the middle of adjacent square through holes, two printers are installed on the top left side of the fixed frame, the blocking mechanism is arranged on the fixed frame, and the moving mechanism is arranged on the fixed frame.

[0008] Optionally, the blocking mechanism includes a connecting frame, an electric push rod and a baffle, the top surface of the fixed frame is connected to the connecting frame, the electric push rod is installed in the middle of the connecting frame, the bottom of the telescopic rod of the electric push rod is connected to the baffle, and the baffle is located on the left side of the positioning block.

[0009] Optionally, the moving mechanism includes a motor, a screw and a moving frame. The motor is installed on one side of the fixed frame. A screw is rotatably arranged on the upper part of the fixed frame. One end of the screw is connected to the output shaft of the motor. Two moving frames are threadedly connected to the screw. The two moving frames are located between the positioning block and the baffle. Two clamping blocks are connected on the sides of the two moving frames away from each other. The moving frame is slidably connected to the guide rod on the fixed frame.

[0010] Optionally, a positioning block is further included, the inner side of the fixed frame is symmetrically connected with the positioning block front and back, the right part of the positioning block is an inclined surface, the baffle is located on the left side of the positioning block, and two movable frames are located between the positioning block and the baffle.

[0011] Optionally, it also includes a stopper and an elastic member, the left parts of the two positioning blocks are slidably provided with a stopper, a sliding groove is opened on the left side of the stopper, the movable frame is slidably connected to the sliding groove on the stopper on the same side, the movable frame is located on the inner side of the two sliding grooves, and two elastic members are connected between the side of the two stops away from each other and the positioning block on the same side.

[0012] Optionally, a guiding mechanism is also included, which includes a connecting rod, a rotating rod, a guide plate and a torsion spring. A rotating rod is rotatably arranged on the positioning block, and the rotating rod is connected to the connecting rod. The left part of the connecting rod is placed between two blocks on the movable frame on the same side, and the connecting rod is located above the positioning block. The lower part of the rotating rod is connected to the guide plate, and the guide plate is flush with the inclined surface of the adjacent positioning block. A torsion spring is wound around the rotating rod, and one end of the torsion spring is connected to the positioning block, and the other end is connected to the rotating rod.

[0013] Optionally, a connecting plate is also included, the top surface of the fixed frame is connected to the connecting plate, and the connecting plate is slidably connected to the baffle.

[0014] Optionally, a limit plate is also included, and the limit plate is symmetrically connected to the top of the fixed frame. The limit plate is located on the left side of the printing machine, and the distance between the two limit plates can adapt to the size of the lithium iron phosphate battery.

[0015] Optionally, the sides of the two stoppers that are close to each other are both in an inclined state.

[0016] Beneficial effects:

[0017] 1. The present invention can take pictures of the appearance of the acid lithium iron battery for defect detection through a CCD camera, and set a moving mechanism to move the mild and severe acid lithium iron batteries to designated printers respectively, and then print designated marks on the acid lithium iron batteries with different degrees of defects through the designated printer, so as to achieve the purpose of fully automatic appearance detection and mark printing, and avoid re-detection in case of subsequent confusion.

[0018] 2. The block of the present invention can slide accordingly to block the left side of the mobile rack, which will also block the left side of the lithium iron phosphate battery, restricting the movement of the next lithium iron phosphate battery to the left, thereby avoiding the situation of being stuck during transportation.

[0019] 3. The movement of the movable frame of the present invention can drive the rotating rod and the guide plate to rotate, thereby achieving the purpose of correcting the offset lithium iron phosphate battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the connecting frame, electric push rod, baffle and other components of the present invention.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of components such as the automatic conveyor belt, printing machine and positioning block of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the connecting frame, the electric push rod and the baffle of the present invention.

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the moving mechanism of the present invention.

[0025] Figure 6 It is a schematic diagram of a first partial three-dimensional structure of the stopper and the elastic member of the present invention.

[0026] Figure 7 It is a schematic diagram of a second partial three-dimensional structure of the stopper and the elastic member of the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the guide mechanism of the present invention.

[0028] Marked in the figure: 1_fixed frame, 13_CCD camera, 2_automatic conveyor belt, 3_printing machine, 4_positioning block, 5_connecting frame, 6_electric push rod, 7_baffle, 8_moving mechanism, 81_motor, 82_screw rod, 83_moving frame, 91_baffle, 92_elastic part, 10_guide mechanism, 101_connecting rod, 102_rotating rod, 103_guide plate, 104_torsion spring, 11_connecting plate, 12_limiting plate. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with specific embodiments. It should also be noted that, unless otherwise clearly specified and limited, terms such as: setting, installing, connecting, and connecting should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Embodiment 1: A lithium iron phosphate battery surface printing device, see Figure 1-Figure 3 As shown, it includes a fixed frame 1, a CCD camera 13, an automatic conveyor belt 2, a printer 3, a positioning block 4, a blocking mechanism and a moving mechanism. The automatic conveyor belt 2 is installed on the fixed frame 1. When the automatic conveyor belt 2 is started, the lithium iron phosphate battery can be transported to the left for subsequent appearance inspection and printing marking. Square through holes are opened on the front and rear sides of the fixed frame 1. A guide rod is connected between the front and rear sides of the inner side of the fixed frame 1. CCD cameras 13 are installed on the upper inner side and the front and rear sides of the fixed frame 1. The CCD cameras 13 on the front and rear sides are located in the middle of adjacent square through holes. Two printers 3 are installed on the top left side of the fixed frame 1. The printer 3 is located above the automatic conveyor belt 2. The printer 3 can complete the printing marking by contacting the surface of the lithium iron phosphate battery. Positioning blocks 4 are symmetrically welded on the front and rear sides of the inner side of the fixed frame 1. The right part of the positioning block 4 is an inclined surface. The positioning block 4 can limit the transported lithium iron phosphate battery to make it move in a straight line to avoid deviation. A blocking mechanism is provided on the fixed frame 1, and a moving mechanism 8 is provided on the fixed frame 1.

[0031] See also Figure 2 and Figure 4As shown, the blocking mechanism includes a connecting frame 5, an electric push rod 6, a baffle 7, a connecting plate 11 and a limit plate 12. The connecting frame 5 is welded to the right part of the top surface of the fixed frame 1, and the electric push rod 6 is installed in the middle of the connecting frame 5. The bottom of the telescopic rod of the electric push rod 6 is connected to the baffle 7, and the baffle 7 is located on the left side of the positioning block 4. A connecting plate 11 is welded to the top surface of the fixed frame 1. The connecting plate 11 is slidably connected to the baffle 7. The connecting plate 11 is used to guide the baffle 7. The limit plate 12 is symmetrically welded on the top of the fixed frame 1. The limit plate 12 is located on the left side of the printing machine 3, and the spacing between the two limit plates 12 can adapt to the size of the lithium iron phosphate battery. The limit plate 12 is used to limit the lithium iron phosphate battery to make it move linearly.

[0032] See also Figure 1 and Figure 5 As shown, the moving mechanism 8 includes a motor 81, a screw rod 82 and a moving frame 83. The motor 81 is installed on the upper front side of the fixed frame 1, and the screw rod 82 is rotatably arranged on the upper part of the fixed frame 1. The front end of the screw rod 82 is connected to the output shaft of the motor 81, and two moving frames 83 are threadedly connected to the screw rod 82. The two moving frames 83 are located between the positioning block 4 and the baffle 7. Two clamping blocks are connected on the sides of the two moving frames 83 away from each other. The moving frame 83 is slidably connected to the guide rod on the fixed frame 1. The shape of the moving frame 83 is an inverted T shape. The rotation of the screw rod 82 will drive the moving frame 83 to move forward or backward, so as to move the lithium iron phosphate battery to the corresponding printing machine 3 for printing.

[0033] When it is necessary to perform appearance inspection and print marking on the lithium iron phosphate battery, the electric push rod 6 and the motor 81 are connected to the control system. First, the automatic conveyor belt 2, the CCD camera 13 and the printer 3 are started, and the electric push rod 6 and the motor 81 are energized to make the automatic conveyor belt 2 rotate counterclockwise. Then, the lithium iron phosphate batteries are placed on the automatic conveyor belt 2 at intervals in sequence, and the automatic conveyor belt 2 will transport the lithium iron phosphate battery to the left. When the lithium iron phosphate battery moves to the left and contacts the inclined surface on the positioning block 4, the guiding effect of the inclined surface will cause the lithium iron phosphate battery to automatically adjust its position until it stabilizes between the two positioning blocks 4. The transportation position of the lithium iron phosphate battery can be limited to prevent it from shifting. The lithium iron phosphate battery continues to move to the left to between the two movable frames 83 Since the baffle 7 blocks the left side of the two movable frames 83, it will also block the left side of the lithium iron phosphate battery, restricting its movement to the left and stopping. The CCD camera 13 will take a picture of the lithium iron phosphate battery for appearance defect detection. If the appearance of the lithium iron phosphate battery is flawless and qualified, the control system controls the telescopic rod of the electric push rod 6 to shorten, thereby driving the baffle 7 to move upward and no longer block the lithium iron phosphate battery. The connecting plate 11 plays a guiding role, and the lithium iron phosphate battery can continue to move to the left and pass smoothly. The limit plate 12 can limit the lithium iron phosphate battery that passes smoothly. After passing smoothly, the control system controls the telescopic rod of the electric push rod 6 to extend, driving the baffle 7 to move downward and reset. When the next lithium iron phosphate battery moves between the two movable frames 83, continue It is blocked by the baffle 7 and stops, and the CCD camera 13 is used to take a picture of the lithium iron phosphate battery for appearance defect detection. If the lithium iron phosphate battery has a slight defect, the output shaft of the motor 81 will automatically rotate, driving the screw 82 to rotate, and the rotation of the screw 82 drives the movable frame 83 to move forward. The guide rod on the fixed frame 1 plays a guiding role. The forward movement of the movable frame 83 will push the lithium iron phosphate battery forward to the right side of the printing machine 3 on the front side. The lithium iron phosphate battery continues to move to the left and is printed with a specified mark on its top surface by the printing machine 3 on the front side. After the lithium iron phosphate battery is moved to the front side and moves to the left, the control system controls the output shaft of the motor 81 to reverse, driving the screw 82 to reverse, and the screw 82 reverses and drives the movable frame 83 to move backward to The middle position is reset. On the contrary, if the next lithium iron phosphate battery is photographed and a serious appearance defect is detected, the control system controls the output shaft of the motor 81 to continue to reverse, driving the screw rod 82 to reverse, and the screw rod 82 reverses to drive the movable frame 83 to continue to move backward. The movable frame 83 continues to move backward and pushes the lithium iron phosphate battery backward to the right side of the rear printing machine 3. The lithium iron phosphate battery continues to move to the left and prints a specified mark on its top surface through the rear printing machine 3. While the lithium iron phosphate battery moves to the left, the control system controls the output shaft of the motor 81 to rotate, driving the screw rod 82 to rotate, and the screw rod 82 rotates to drive the movable frame 83 to move forward to the middle position and reset, so that the appearance of the lithium iron phosphate battery can be automatically inspected.Different marks are printed on lithium iron phosphate batteries with different defect levels to facilitate subsequent classification, and even if confusion occurs, they can be classified according to the marks. When the device is not needed, the automatic conveyor belt 2, CCD camera 13 and printer 3 are turned off, and the motor 81 and electric push rod 6 are powered off.

[0034] Example 2: Based on Example 1, refer to Figure 6 and Figure 7 As shown, it also includes a block 91 and an elastic member 92. The left parts of the two positioning blocks 4 are both slidably provided with a block 91. A slide groove is opened on the left side of the block 91. The movable frame 83 is slidably connected with the slide groove on the block 91 on the same side. The block 91 slides accordingly to block the left side of the movable frame 83, and will also block the left side of the lithium iron phosphate battery, limiting the movement of the rear lithium iron phosphate battery to the left to avoid transportation jam. The sides where the two blocks 91 are close to each other are both in an inclined state inclined inwardly, and the sides where the two blocks 91 are away from each other are connected to the positioning block 4 on the same side with two elastic members 92, and the elastic members 92 are symmetrically distributed up and down.

[0035] When performing appearance inspection and printing marks on lithium iron phosphate batteries, if there are slight defects in the appearance of the lithium iron phosphate battery after inspection, since the baffle 7 blocks the left sides of the two movable frames 83, it will also block the left side of the lithium iron phosphate battery, restricting its movement to the left. At this time, the control system controls the output shaft of the motor 81 to rotate, driving the screw rod 82 to rotate, and the rotation of the screw rod 82 drives the movable frame 83 to move forward. The forward movement of the movable frame 83 will push the lithium iron phosphate battery forward to the right side of the front printing machine 3, and the lithium iron phosphate battery can continue to move to the left through the corresponding printing machine 3 on the front side to print the specified mark. At the same time, the movable frame 83 on the rear side will pull the rear block 91 to move forward, the elastic member 92 will stretch, and the block 91 will move forward. It is blocked between the left sides of the two positioning blocks 4, and then the rear lithium iron phosphate battery can be blocked between the two positioning blocks 4, blocking the rear lithium iron phosphate battery from continuing to move to the left, avoiding it from interfering with the printing during the printing process of the previous lithium iron phosphate battery. When the previous lithium iron phosphate battery continues to move to the left for printing, the control system controls the output shaft of the motor 81 to reverse, driving the screw 82 to reverse, and the movable frame 83 will move backward and reset, and drive the block 91 to reset under the action of the elastic member 92 restoring its original state, and the rear lithium iron phosphate battery can continue to move to the left and be blocked by the baffle 7 for taking pictures, and according to the detection results, the designated mark is printed or directly passed through the corresponding printing machine 3. When the device is not needed, the motor 81 and the electric push rod 6 can be powered off.

[0036] See also Figure 1 and Figure 8As shown, it also includes a guiding mechanism 10, which includes a connecting rod 101, a rotating rod 102, a guide plate 103 and a torsion spring 104. The rotating rod 102 is rotatably arranged on the positioning block 4, and the rotating rod 102 is in a vertical state. The connecting rod 101 is connected to the rotating rod 102. The left part of the connecting rod 101 is placed between two blocks on the moving frame 83 on the same side. The connecting rod 101 is located above the positioning block 4. The lower part of the rotating rod 102 is fixedly welded with a guide plate 103, and the guide plate 103 is flush with the inclined surface of the adjacent positioning block 4. The rotation of the guide plate 103 can straighten the offset lithium iron phosphate battery to ensure its smooth transportation to the left. The rotating rod 102 is wound with a torsion spring 104, and one end of the torsion spring 104 is connected to the positioning block 4, and the other end is connected to the rotating rod 102.

[0037] When the lithium iron phosphate battery on the automatic conveyor belt 2 is being transported to the left, if the moving frame 83 moves forward, the previous lithium iron phosphate battery needs to be pushed forward to align it with the front printer 3 for printing a slight defect mark. This process will also trigger the front moving frame 83 to push the front connecting rod 101 forward, driving the front rotating rod 102 to rotate counterclockwise. The front rotating rod 102 rotates counterclockwise to drive the front guide plate 103 to rotate counterclockwise, and the front torsion spring 104 is deformed. The front guide plate 103 rotates counterclockwise to push the next lithium iron phosphate battery to move, so that it is The rear guide plate 103 is rotated clockwise, and the torsion spring 104 is deformed. The rear guide plate 103 rotates clockwise to push the next lithium iron phosphate battery forward, so as to achieve the purpose of correcting it and allowing it to pass smoothly. When the movable frame 83 is reset, the torsion spring 104 returns to its original state, which can drive the rotating rod 102 and the guide plate 103 to reset.

[0038] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A lithium iron phosphate battery surface printing device, comprising a fixed frame (1) and an automatic conveyor belt (2), wherein the automatic conveyor belt (2) is mounted on the fixed frame (1), square through holes are provided on both the front and rear sides of the fixed frame (1), and a guide rod is connected between the front and rear sides of the inner side of the fixed frame (1), wherein: The invention also comprises a blocking mechanism, a CCD camera (13), a printing machine (3) and a moving mechanism. The blocking mechanism is arranged on the fixed frame (1). The CCD camera (13) is installed on the upper inner part and the front and rear sides of the fixed frame (1). The CCD cameras (13) on the front and rear sides are located in the middle of adjacent square through holes. The two printing machines (3) are installed on the left side of the top of the fixed frame (1). The moving mechanism (8) is arranged on the fixed frame (1). The moving mechanism (8) comprises a motor (81), A screw rod (82) and a movable frame (83), wherein the motor (81) is mounted on one side of the fixed frame (1), the screw rod (82) is rotatably arranged on the upper part of the fixed frame (1), one end of the screw rod (82) is connected to the output shaft of the motor (81), two movable frames (83) are threadedly connected to the screw rod (82), two blocks are connected to the sides of the two movable frames (83) away from each other, and the movable frames (83) are slidably connected to the guide rod on the fixed frame (1).

2. A lithium iron phosphate battery surface printing device as claimed in claim 1, characterized in that: The blocking mechanism comprises a connecting frame (5), an electric push rod (6) and a baffle (7); the connecting frame (5) is connected to the top surface of the fixed frame (1); the electric push rod (6) is installed in the middle of the connecting frame (5); and the baffle (7) is connected to the bottom of the telescopic rod of the electric push rod (6).

3. A lithium iron phosphate battery surface printing device as claimed in claim 2, characterized in that: It also includes a positioning block (4), the positioning block (4) is symmetrically connected to the inner side of the fixed frame (1) in a front-to-rear manner, the right part of the positioning block (4) is an inclined surface, the baffle (7) is located on the left side of the positioning block (4), and the two movable frames (83) are located between the positioning block (4) and the baffle (7).

4. A lithium iron phosphate battery surface printing device as claimed in claim 2, characterized in that: It also includes a stopper (91) and an elastic member (92), wherein the stopper (91) is slidably arranged on the left side of the two positioning blocks (4), a sliding groove is opened on the left side of the stopper (91), the movable frame (83) is slidably connected to the sliding groove on the stopper (91) on the same side, and the elastic member (92) is connected between the stopper (91) and the positioning block (4) on the same side.

5. A lithium iron phosphate battery surface printing device as claimed in claim 3, characterized in that: The invention also comprises a guiding mechanism (10), the guiding mechanism (10) comprising a connecting rod (101), a rotating rod (102), a guide plate (103) and a torsion spring (104); the rotating rod (102) is rotatably arranged on the positioning block (4); the connecting rod (101) is connected to the rotating rod (102); the left part of the connecting rod (101) is located between two blocks on the movable frame (83) on the same side; the connecting rod (101) is located above the positioning block (4); the guide plate (103) is connected to the lower part of the rotating rod (102); the guide plate (103) is in flush contact with the inclined surface of the adjacent positioning block (4); the torsion spring (104) is wound around the rotating rod (102); one end of the torsion spring (104) is connected to the positioning block (4) and the other end is connected to the rotating rod (102).

6. A lithium iron phosphate battery surface printing device as claimed in claim 5, characterized in that: It also includes a connecting plate (11), wherein the connecting plate (11) is connected to the inner top surface of the fixing frame (1), and the connecting plate (11) is slidably connected to the baffle (7).

7. A lithium iron phosphate battery surface printing device as claimed in claim 6, characterized in that: It also comprises a limiting plate (12), wherein the limiting plate (12) is symmetrically connected to the top of the fixed frame (1) in a front-to-back manner, and the limiting plate (12) is located on the left side of the printing machine (3).

8. A lithium iron phosphate battery surface printing device as claimed in claim 7, characterized in that: The sides of the two stoppers (91) that are close to each other are both in an inclined state.

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